Sillimanite and Turquoise Physical Properties

Sillimanite

Turquoise

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1 Physical Properties

1.1 Tenacity

Tough

Not Available

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.20-3.26

2.30-2.90

1.5 Fracture

Splintery

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

{010} perfect

Good to perfect_usually N/A

1.7 Mohs Hardness

6-7.5

5-6

1.8 Chemical Composition

Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

CuAl₆(PO₄)₄(OH)₈ • 4H₂O

Sillimanite and Turquoise Chemical Formula

While comparing Sillimanite and Turquoise physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Sillimanite and Turquoise chemical formula.

Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Turquoise- CuAl₆(PO₄)₄(OH)₈ • 4H₂O

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Sillimanite and Turquoise Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Turquoise Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Turquoise Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 2.30-2.90 whereas that of Turquoise is 2.30-2.90.